A compound contains equal masses of the elements `A`,`B` and `C` .If the atomic masses of `A `, `B` and `C` are 20,40 and 60 respectively ,the empirical formula of the compound is

(a) `A_(3)B_(2)C`
(b) `AB_(2)C_(3)`
(c) `ABC`
(d) `A_(6)B_(3)C_(2)`

A compound contains three elements A, B and C, if the oxidation of A= +2, B=+5 and C= -2, the possible formula of the compound is :

A compound contains three elements A,B and C , if the oxidation number of A=+2B=+5 and C=-2 then possible formula of the compound is

The empirical formula of the compound is CH. Its molecular weight is 78. The molecular formula of the compound will be : (a) C_(2)H_(2) (b) C_(3)H_(3) (c) C_(4)H_(4) (d) C_(6)H_(6)

Atoms of elements A, B and C combine to form a compound in the atomic ratio of 1 : 6 : 2 . Atomic masses of A, B and C are 64, 4 and 16 respectively. What will be the maximum mass of a compound formed from 1.28 g of A, 3xx10^(23) atoms of B and 0.04 moles of C ?

A + 2B+ 3C AB_2 C_3 Reaction of 6.0 g of A, 6.0 xx 10^(23) atoms of B, and 0.036 mol of C yields 4.8 g of compound AB_(2)C_(3) . If the atomic mass of A and C are 60 and 80 amu, respectively. The atomic mass of B is: (Avogadro number = 6 xx 10^(23) )

If A:B=3:4 and B:C=2:3 , find A:B:C .

The circle inscribed in the triangle ABC touches the side BC, CA and AB in the point A_(1)B_(1) and C_(1) respectively. Similarly the circle inscribed in the Delta A_(1) B_(1) C_(1) touches the sieds in A_(2), B_(2), C_(2) respectively and so on. If A_(n) B_(n) C_(n) be the nth Delta so formed, prove that its angle are pi/3-(2)^-n(A-(pi)/(3)), pi/3-(2)^-n(B-(pi)/(3)),pi/3-(2)^-n(C-(pi)/(3)). Hence prove that the triangle so formed is ultimately equilateral.

Let the incircle of DeltaABC touches the sides BC, CA, AB at A_(1), B_(1),C_(1) respectively. The incircle of DeltaA_(1)B_(1)C_(1) touches its sides of B_(1)C_(1), C_(1)A_(1) and A_(1)B_(1)" at " A_(2), B_(2), C_(2) respectively and so on. Q. In DeltaA_(4)B_(4)C_(4) , the value of angleA_(4) is:

To find the condition that the three straight lines A_(1)x+B_(1)y+C_(1)=0, A_(2)x+B_(2)y+C_(2)=0 and A_(3)x+B_(3)y+C_(3)=0 are concurrent.

Factorise : 12abc -6a^(2) b^(2) c^(2) + 3a^(3) b^(3) c^(3)